New 408

af2 · Posted: Sun Oct 20, 2013 12:39 pm Post subject:

It all depends on the alloy. But steel and stainless are within .2 lbs per foot.

Paul P · Posted: Sun Oct 20, 2013 11:28 pm Post subject:

Ok just to be clear the stainless 3.5" pipe I have is .060" thick. The steel 3" pipe I removed is near .120" thick. There is the weight end of story. I know that they are basically the same material weight a=b dimensions but they are different thicknesses like I said in my post earlier.

Moving on now. The WB )2 sensor had to be replaced when after warming up the motor it was all over the place. The 22 psi fuel pressure setting has a lean miss as I am accelerating through the higher RPMs. The gauge is reading lean in the mid to high 13/1 AFR and as soon as I hear a miss fire I let off. Mid range is nice! I will have to fatten it up with more fuel pressure and some adjustments.

af2 · Posted: Tue Oct 22, 2013 8:25 pm Post subject:

I don't think the original was .120 wall..... But going from 14 gauge to 16 gauge is going to be lighter.!!
Glad you have a handle on it!!! Good luck Paul the times will tell...

Paul P · Posted: Tue Oct 22, 2013 8:41 pm Post subject:

Hi Adam,
Torque Tech says that they are 16 gauge steel with aluminized coating. Certainly not .120" thick you are right. They are up for sale too!

Paul P · Posted: Sat Nov 16, 2013 7:31 pm Post subject:

25psi not enough. <TEST TEST TEST>.... Rolling Eyes

Not sure how much this regulator has in it.

clay · Posted: Sun Nov 17, 2013 8:53 pm Post subject:

How about the fuel pump? I'm thinking you are exceeding what Holley ever planned that system feeding. However I would think you could get around that by forcing the regulator open and running an external regulator and something like a A1000 pump. That combo would feed a ton as least from a supply point. Keep us posted. Clay

10sec.et · Posted: Sun Nov 17, 2013 9:55 pm Post subject:

Paul P · Posted: Sun Nov 17, 2013 10:20 pm Post subject:

Yes I have thought of regulating it from outside.

Remember this thing was running well with the old injectors which did flow better than the new style. The supplied pump is 255 LPH with a with a 100 PSI peak pressure. Should be fine for near 900 HP normally aspirated.

clay · Posted: Sun Nov 17, 2013 10:31 pm Post subject:

I thought you were close when the injectors failed but never knew you had it figured out. Looks like Holley did good on putting plenty of pump capacity in that system - sounds like you've got a good handle on it and are close. Cool. Clay

Paul P · Posted: Sun Nov 17, 2013 10:55 pm Post subject:

Hope so. The original injectors were doing well with only 21psi until they quit. Adjusted it last night and the pressure is fluctuating about 1/2 psi but holding at 28. There might be more in it still.

If I had 2000 to drop on Fast 2.0 I would do it.

10sec.et · Posted: Tue Nov 19, 2013 11:04 pm Post subject:

just my opinion but, i dont really care for the FAST EFI. I have never installed one i didnt have issues with. I do like the Holley setup. IMO, the best option is to build your own with a factory GM computer and harness.

Big Dave · Posted: Wed Nov 20, 2013 12:25 am Post subject:

Paul P · Posted: Wed Nov 20, 2013 9:27 am Post subject:

clay · Posted: Wed Nov 20, 2013 10:17 pm Post subject:

I'm guessing it's programming related. From what I've seen in the Ford computer there are a tremendous amount of parameters dealing with drivability, idle, air conditioning control, emissions, etc. and about another 100 that I have no clue whaty they deal with. I don't think it would be hardware related but I'm just guessing. Clay